System and method for recycling emission of hydrogen peroxide device

Abstract

The invention discloses a hydrogen peroxide device emission recovery treatment system and method. The system comprises a waste gas treatment device and a wastewater treatment device, the waste gas treatment device comprises two work sheds, one work shed is used for covering the accident tank and the oil separation tank, and the other work shed is used for covering the acid ground tank and the alkaline ground tank; the two work sheds are respectively connected with an incinerator or a chimney through exhaust pipes; the wastewater treatment device comprises a waste oil tank, a reaction tank and a clean oil tank, the oil separation tank is connected with the waste oil tank through a liquid pumping pipe, a water phase outlet of the waste oil tank is connected with the oil separation tank through a return pipe, an oil phase outlet of the waste oil tank is connected with the reaction tank containing aluminum oxide, and a clean oil outlet of the reaction tank is connected with the clean oil tank; waste gas and working waste liquid generated in the hydrogen peroxide production process can be recycled, the surrounding odor of the hydrogen peroxide device can be reduced, and meanwhile, the working liquid can be directly recycled.

Description

Technical Field

[0001] The invention relates to the technical field of emission recovery, and in particular to a system and method for recovering emission from a hydrogen peroxide device. Background Art

[0002] As the name suggests, a hydrogen peroxide device is a device that produces hydrogen peroxide, i.e. hydrogen peroxide. The accident pool, grease trap, and ground trough set up in the hydrogen peroxide device are only considered as safety measures during the original design period. The use of on-site direct discharge or release methods can ensure the safety of the device.

[0003] In the process of producing hydrogen peroxide (hydrogen peroxide), especially when using the anthraquinone method, a large amount of wastewater and waste gas will be generated. Wastewater mainly comes from the production process, equipment cleaning and by-product treatment. These wastewaters contain residual hydrogen peroxide, organic impurities (such as monoethyl anthraquinone), heavy metal ions and other auxiliary chemicals, with high COD (chemical oxygen demand), special pollutants, and may be acidic or alkaline. Waste gas mainly comes from production stages such as hydrogenation and oxidation, which contain unreacted oxygen, steam, aromatic hydrocarbon vapor, hydrogen peroxide vapor and a small amount of organic volatiles (VOCs) and other gas components. These substances are harmful to the human body and the environment.

[0004] However, when the hydrogen peroxide device is set up by direct discharge or release on site, environmental protection requirements are not taken into consideration, resulting in excessive VOC (volatile organic compounds) around the hydrogen peroxide device. This causes a strong odor on site and is difficult to solve. At the same time, the cleanliness of the oil phase in the grease trap cannot meet the use requirements when it is recovered. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a system and method for recovering and treating emissions from a hydrogen peroxide device, which can realize the recovery and treatment of waste gas and working waste liquid generated in the hydrogen peroxide production process, can reduce the surrounding odor of the hydrogen peroxide device, and at the same time realize the direct recovery of the working liquid, thereby ensuring the cleanliness of the oil phase recovery.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, a hydrogen peroxide device emission recovery and treatment system is provided, comprising a waste gas treatment device and a waste water treatment device; the waste gas treatment device comprises two sheds, one of which is used to cover an accident pool and an oil separator, and the other is used to cover an acidic trough and an alkaline trough; the two sheds are respectively connected to an incinerator or a chimney through an exhaust pipe; the waste water treatment device comprises a waste oil tank, a reaction tank and a clean oil tank, the oil separator is connected to the waste oil tank through a liquid extraction pipe, the water phase outlet of the waste oil tank is connected to the oil separator through a reflux pipe, the oil phase outlet of the waste oil tank is connected to a reaction tank containing alumina, and the clean oil outlet of the reaction tank is connected to the clean oil tank; oil cleanliness detection points are provided on the pipeline connecting the liquid extraction pipe to the waste oil tank, the pipeline connecting the waste oil tank and the reaction tank, and the oil outlet pipeline of the reaction tank.

[0008] In some embodiments of the present invention, a control valve is provided on the air extraction pipe, the air extraction pipe is connected to the incinerator or the chimney through an air intake pipe, and a fan and an air intake valve are provided on the air intake pipe.

[0009] In some embodiments of the present invention, two liquid extraction pipes are provided, and the two liquid extraction pipes are respectively connected to the oil phase and the water phase in the grease trap, and each liquid extraction pipe is provided with a control valve.

[0010] In some embodiments of the present invention, the liquid suction pipe is connected to the liquid outlet pipe through a first machine pump, and the liquid outlet pipe is connected to the waste oil tank through an oil inlet pipe. Control valves are provided on both the liquid outlet pipe and the oil inlet pipe. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank through a connecting pipe, and the connecting pipe is provided with a control valve and a second machine pump.

[0011] In some embodiments of the present invention, the connecting pipe is also connected to the preparation kettle through a pipeline.

[0012] In some embodiments of the present invention, the oil phase outlet of the waste oil tank is connected to the reaction tank through a discharge pipe, a third machine pump, and a connecting pipe in sequence. Two control valves are provided on the discharge pipe. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank through a connecting pipe. A control valve is provided on the connecting pipe.

[0013] In some embodiments of the present invention, two reaction tanks are provided, and the two reaction tanks are arranged in parallel. The inlet pipe and the outlet pipe of the reaction tank are also connected through a reflux pipe, and a control valve is provided on the reflux pipe.

[0014] In some embodiments of the present invention, a coalescer is provided on the reflux pipe connecting the waste oil tank and the grease trap.

[0015] In a second aspect of the present invention, a method for recovering and treating emissions from a hydrogen peroxide device is provided, comprising:

[0016] The oil in the oil phase in the grease trap is pumped into the waste oil tank. After standing, the water in the waste oil tank is returned to the grease trap; the oil in the waste oil tank is pumped into the reaction tank for treatment; the clean oil after treatment is transported to the clean oil tank;

[0017] When the oil cleanliness tester on the pipeline connecting the liquid extraction pipe and the waste oil tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the waste oil tank;

[0018] When the oil cleanliness tester on the pipeline connecting the waste oil tank and the reaction tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the reaction tank;

[0019] When the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is unqualified, it will flow back to the reaction tank for purification again until it is qualified and transported to the clean oil tank.

[0020] In some embodiments of the present invention, water in the aqueous phase in the grease trap is pumped into a formulation kettle for recycling.

[0021] One or more technical solutions of the present invention have the following beneficial effects:

[0022] (1) The emission recovery and treatment system of the hydrogen peroxide device provided by the present invention can prevent the VOC around the hydrogen peroxide device from exceeding the standard and reduce the odor around the hydrogen peroxide device by building a shed on the accident pool, the grease trap, the acidic trough and the alkaline trough, and using a fan to pump the gas in the shed to a high point for discharge or into an incinerator for incineration. In addition, the clean working fluid obtained by regenerating the oil in the oil phase in the grease trap with alumina can be directly recovered, thereby greatly reducing the difficulty of operating the preparation kettle to recover the working fluid.

[0023] (2) The hydrogen peroxide device emission recovery and treatment system provided by the present invention can set multiple detection points in the wastewater treatment device, and can select different control valves to open and perform different working states according to the cleanliness of the working fluid, and can timely deliver the clean working fluid into the clean oil tank to avoid subsequent reaction processes, thereby improving the recovery efficiency.

[0024] (3) The emission recovery and treatment system of the hydrogen peroxide device provided by the present invention purifies the working liquid by setting up two reaction tanks filled with alumina. The activated alumina can adsorb alkali liquid, regenerate degradation products and purify the working liquid. In addition, since the activated alumina has a high adsorption efficiency and regeneration capacity, by setting up two reaction tanks to work alternately, the degradation products and alkali liquid in the working liquid can be continuously and stably removed, thereby ensuring the continuity and stability of the hydrogen peroxide preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an exhaust gas treatment device of the present invention;

[0026] Figure 2 It is a schematic diagram of the wastewater treatment device of the present invention.

[0027] In the figure: 1, work shed; 2, accident pool; 3, grease trap; 4, air extraction pipe; 5, first control valve; 6, air intake pipe; 7, second control valve; 8, fan; 9, third control valve; 10, chimney; 11, incinerator; 12, preparation kettle; 13, first machine pump; 14, liquid extraction pipe; 15, 19th control valve; 16, waste oil tank; 17, first liquid outlet pipe; 18, fourth control valve; 19, fifth control valve; 20, coalescer; 21, first connecting pipe; 22, 20th control valve; 23, seventh connecting pipe; 24, 15th control valve; 25, first reflux pipe; 26, seventh control valve; 2 7. Oil purification tank; 28. Second machine pump; 29. ​​Sixth control valve; 30. Third machine pump; 31. First discharge pipe; 32. Fifth connecting pipe; 33. Eighth control valve; 34. Tenth control valve; 35. Eleventh control valve; 36. Fourth connecting pipe; 37. Ninth control valve; 38. Reaction tank; 39. Second oil inlet pipe; 40. Second oil outlet pipe; 41. Twelfth control valve; 42. Thirteenth control valve; 43. Eighteenth control valve; 44. Second return pipe; 45. Fourteenth control valve; 46. Third oil inlet pipe; 47. Seventeenth switch valve; 50. Acidic trough; 60. Alkaline trough. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Example 1

[0030] In a typical embodiment of the present invention, a hydrogen peroxide device discharge recovery and treatment system is provided, such as Figure 1 and Figure 2As shown, it includes a waste gas treatment device and a waste water treatment device; the waste gas treatment device includes two sheds 1, one of which is used to cover the accident pool 2 and the grease trap 3, and the other shed 1 is used to cover the acid trough 50 and the alkaline trough 60; the two sheds 1 are respectively connected to the incinerator 11 or the chimney 10 through the exhaust pipe 4; the grease trap 3 is connected to the waste oil tank 16 through the liquid extraction pipe, the water phase outlet of the waste oil tank 16 is connected to the grease trap 3 through the reflux pipe, the oil phase outlet of the waste oil tank 16 is connected to the reaction tank 38 containing alumina, and the clean oil outlet of the reaction tank 38 is connected to the clean oil tank 27; an oil cleanliness detector is provided on the pipeline connecting the liquid extraction pipe and the waste oil tank 16, the pipeline connecting the waste oil tank 16 and the reaction tank 38, and the oil outlet pipeline of the reaction tank 38.

[0031] In this embodiment, a control valve is provided on the exhaust pipe, the exhaust pipe is connected to the incinerator or chimney through an air inlet pipe, and a fan and an air inlet valve are provided on the air inlet pipe. Specifically, two exhaust pipes 4 are respectively inserted into two work sheds 1, a first control valve 5 is installed on the exhaust pipe 4, an air inlet of the fan 8 is connected to an air inlet pipe 6, the exhaust pipe 4 is connected to the air inlet pipe 6, a second control valve 7 is installed on the air inlet pipe 6, an air outlet of the fan 8 is connected to an air outlet pipe, a third control valve 9 is installed on the air outlet pipe, the air outlet pipe is connected to the interior of the incinerator 11, and a chimney 10 is connected to the air outlet pipe.

[0032] In this embodiment, two liquid extraction pipes 14 are provided. The two liquid extraction pipes 14 are respectively connected to the oil phase and the water phase in the grease trap 3. A control valve is provided on each liquid extraction pipe.

[0033] Furthermore, the liquid extraction pipe 14 is connected to the liquid outlet pipe through the first machine pump 13, and the liquid outlet pipe is connected to the waste oil tank 16 through the oil inlet pipe. Control valves are provided on the liquid outlet pipe and the oil inlet pipe. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank 27 through a connecting pipe, and the connecting pipe is provided with a control valve and a second machine pump 28.

[0034] Furthermore, the connecting pipe is also connected to the preparation kettle 12 through a pipeline.

[0035] Furthermore, a coalescer 20 is provided on the reflux pipe connecting the waste oil tank 16 and the grease trap 3. The coalescer 20 isolates impurities, filters and accumulates liquid foam in the waste water flowing out of the waste oil tank 16, and then returns the waste water to the grease trap.

[0036] Specific as Figure 2As shown, the liquid inlet of the first pump 13 is connected to two liquid extraction pipes 14, and the two liquid extraction pipes 14 respectively extract the water phase and the oil phase in the grease trap 3. The nineteenth control valve 15 is installed on the liquid extraction pipe 14, and the liquid outlet of the first pump 13 is connected to the first liquid outlet pipe 17. The wastewater treatment device also includes a waste oil tank 16, a clean oil tank 27 and a second pump 28. The waste oil tank 16 is connected to a first oil inlet pipe, and the first oil inlet pipe is connected to the first liquid outlet pipe 17. The bottom of the waste oil tank 16 is connected to a first reflux pipe 25, and the first reflux pipe 25 is connected to the grease trap 3. The first reflux pipe 25 is installed with a coalescer 20 and a seventh control valve 26.

[0037] A fourth control valve 18 is installed on the first liquid outlet pipe 17, a fifth control valve 19 is installed on the first oil inlet pipe, the liquid inlet of the second machine pump 28 is connected to the first connecting pipe 21, the first connecting pipe 21 is connected between the first liquid outlet pipe 17 and the first oil inlet pipe, a twentieth control valve 22 is installed on the first connecting pipe 21, the liquid outlet of the second machine pump 28 is connected to the second connecting pipe, the second connecting pipe is connected to the clean oil tank 27, and a sixth control valve 29 is installed on the second connecting pipe.

[0038] In this embodiment, the oil phase outlet of the waste oil tank 16 is connected to the reaction tank 38 through a discharge pipe, a third machine pump, and a connecting pipe in sequence. Two control valves are provided on the discharge pipe. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank 27 through a connecting pipe, and a control valve is provided on the connecting pipe.

[0039] Specific references Figure 2 A first discharge pipe 31 is connected to the waste oil tank 16, and the wastewater treatment device also includes a third machine pump 30. The liquid inlet of the third machine pump 30 is connected to the third connecting pipe, and the third connecting pipe is connected to the first discharge pipe 31. A fourth connecting pipe 36 is connected between the first discharge pipe 31 and the third connecting pipe. The fourth connecting pipe 36 is connected to the clean oil tank 27. An eighth control valve 33 is installed on the first discharge pipe 31, a ninth control valve 37 is installed on the third connecting pipe, and a tenth control valve 34 is installed on the fourth connecting pipe 36. The liquid outlet of the third machine pump 30 is connected to the fifth connecting pipe 32, and the fifth connecting pipe 32 is installed with an eleventh control valve 35.

[0040] In this embodiment, two reaction tanks 38 are provided, and the two reaction tanks 38 are arranged in parallel. The inlet pipe and the outlet pipe of the reaction tank 38 are also connected through a reflux pipe, and a control valve is provided on the reflux pipe.

[0041] The reaction tanks 38 are filled with activated alumina, one of which is provided with a clay bed, and the other is provided with a regeneration bed. In the reaction tank 38 provided with the regeneration bed, the activated alumina is used to regenerate anthraquinone degradation products in the hydrogenation liquid, thereby ensuring the continuity and efficiency of the production process. In the reaction tank 38 provided with the clay bed, the activated alumina can not only regenerate anthraquinone degradation products that may be generated, but also absorb potassium carbonate solution droplets in the working liquid, thereby further improving the quality of hydrogen peroxide. By providing two reaction tanks 38, continuous treatment of the oil phase can be achieved.

[0042] Specifically, the reaction tank 38 is connected with a second oil inlet pipe 39 and a second oil outlet pipe 40, the second oil inlet pipe 39 is connected to the fifth connecting pipe 32, the wastewater treatment device also includes an oil outlet main pipe, an eighteenth control valve 43 is installed on the oil outlet main pipe, a third oil inlet pipe 46 is connected between the clean oil tank 27 and the oil outlet main pipe, the second oil outlet pipe 40 is connected to the third oil inlet pipe 46, a seventeenth switch valve 47 is installed on the third oil inlet pipe 46, a twelfth control valve 41 and a thirteenth control valve 42 are installed on the second oil inlet pipe 39 and the second oil outlet pipe 40 respectively, a second return pipe 44 is connected between the second oil inlet pipe 39 and the second oil outlet pipe 40, a fourteenth control valve 45 is installed on the second return pipe 44, a sixth connecting pipe is connected between the fifth connecting pipe 32 and the first connecting pipe 21, and a sixteenth control valve is installed on the sixth connecting pipe.

[0043] The hydrogen peroxide device further includes a plurality of preparation kettles 12 for preparing hydrogen peroxide. The preparation kettles 12 are connected with a seventh connecting pipe 23 . The seventh connecting pipe 23 is connected with the first connecting pipe 21 . A fifteenth control valve 24 is installed on the seventh connecting pipe 23 .

[0044] The working principle of the hydrogen peroxide device discharge recovery treatment provided in this embodiment is as follows:

[0045] When in use, the acidic trough 50, the alkaline trough 60, the accident pool 2 and the grease trap 3 are surrounded by a shed 1, and then the internal gas is extracted by a fan 8 and sent to the high altitude or the inlet of the incinerator 11 through a chimney 10 for treatment to prevent the VOC around the hydrogen peroxide from exceeding the standard.

[0046] By opening the fourth control valve 18, the fifth control valve 19, the first pump 13 and the corresponding nineteenth control valve 15, the oil in the oil phase in the oil separator 3 is correspondingly pumped into the waste oil tank 16. After the working fluid in the waste oil tank 16 is allowed to stand, the seventh control valve 26 is opened to allow the water phase in the waste oil tank 16 to enter the coalescer 20, and then flow back to the oil separator 3. The third pump 30, the eighth control valve 33, the tenth control valve 34, the eleventh control valve 35 and the corresponding twelfth control valve 41 are opened to pump the oil in the waste oil tank 16 into the reaction tank 38 containing alumina, and then a circulation is established. When the oil in the reaction tank 38 is clean or the pressure of the reaction tank 38 rises to a certain value, the alumina is treated according to the kaolin bed, and the seventeenth switch valve 47 is opened to discharge the clean oil into the clean oil tank to complete the waste oil treatment.

[0047] A first detection point for detecting oil cleanliness is provided between the fourth control valve 18 and the fifth control valve 19 , a second detection point is provided on the fifth connecting pipe 32 , and a third detection point is provided on the second oil outlet pipe 40 .

[0048] During the waste oil treatment process, when the oil detected at the first detection point is clean, the fifth control valve 19 is closed, and the twentieth control valve 22, the second machine pump 28 and the sixth control valve 29 are opened to pump the clean oil into the clean oil tank 27; when the oil detected at the second detection point is clean, the twelfth control valve 41 is closed, the sixteenth control valve, the second machine pump 28 and the sixth control valve 29 are opened to pump the clean oil into the clean oil tank 27; when the oil detected at the third detection point is unclean, the seventeenth switch valve 47 is closed, and the fourteenth control valve 45 is opened to allow the unclean oil to enter the reaction tank 38 again for purification.

[0049] Close the fifth control valve 19 and the nineteenth control valve 15 corresponding to the oil in the grease trap 3, and open the nineteenth control valve 15 and the twentieth control valve 22 and the corresponding fifteenth control valve 24 corresponding to the water, so that the preparation kettle 12 can receive the waste water and realize the secondary use and recycling of water.

[0050] Example 2

[0051] In a typical embodiment of the present invention, a method for recovering and treating emissions from a hydrogen peroxide device is provided, comprising:

[0052] The oil in the oil phase in the grease trap is pumped into the waste oil tank. After standing, the water in the waste oil tank is returned to the grease trap; the oil in the waste oil tank is pumped into the reaction tank for treatment; the clean oil after treatment is transported to the clean oil tank;

[0053] When the oil cleanliness tester on the pipeline connecting the liquid extraction pipe and the waste oil tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the waste oil tank;

[0054] When the oil cleanliness tester on the pipeline connecting the waste oil tank and the reaction tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the reaction tank;

[0055] When the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is unqualified, it will flow back to the reaction tank for purification again until it is qualified and transported to the clean oil tank.

[0056] Furthermore, the water in the aqueous phase in the grease trap is pumped into the preparation kettle for recycling.

[0057] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A hydrogen peroxide device discharge recovery and treatment system, characterized in that: It includes a waste gas treatment device and a waste water treatment device; the waste gas treatment device includes two sheds, one of which is used to cover the accident pool and the oil separator, and the other is used to cover the acidic trough and the alkaline trough; the two sheds are respectively connected to the incinerator or the chimney through the exhaust pipe; the waste water treatment device includes a waste oil tank, a reaction tank and a clean oil tank, the oil separator is connected to the waste oil tank through the extraction pipe, the water phase outlet of the waste oil tank is connected to the oil separator through the reflux pipe, the oil phase outlet of the waste oil tank is connected to the reaction tank containing alumina, and the clean oil outlet of the reaction tank is connected to the clean oil tank; oil cleanliness detection points are arranged on the pipeline connecting the extraction pipe and the waste oil tank, the pipeline connecting the waste oil tank and the reaction tank, and the oil outlet pipeline of the reaction tank.

2. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: The air extraction pipe is provided with a control valve, the air extraction pipe is connected to the incinerator or the chimney through an air intake pipe, and the air intake pipe is provided with a fan and an air intake valve.

3. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: There are two liquid extraction pipes, which are respectively connected to the oil phase and the water phase in the grease trap, and each of the liquid extraction pipes is provided with a control valve.

4. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: The liquid extraction pipe is connected to the liquid outlet pipe through the first machine pump, and the liquid outlet pipe is connected to the waste oil tank through the oil inlet pipe. Control valves are arranged on the liquid outlet pipe and the oil inlet pipe. The two control valves are spaced a certain distance apart, and the position between the two control valves is connected to the clean oil tank through a connecting pipe. The connecting pipe is provided with a control valve and a second machine pump.

5. The hydrogen peroxide device discharge recovery and treatment system according to claim 4, characterized in that: The connecting pipe is also connected to the preparation kettle through a pipeline.

6. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: The oil phase outlet of the waste oil tank is connected to the reaction tank through a discharge pipe, a third machine pump, and a connecting pipe in sequence. Two control valves are arranged on the discharge pipe. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank through a connecting pipe. The connecting pipe is provided with a control valve.

7. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: There are two reaction tanks, which are arranged in parallel. The inlet pipe and the outlet pipe of the reaction tank are also connected through a reflux pipe, and a control valve is arranged on the reflux pipe.

8. The hydrogen peroxide device discharge recovery and treatment system according to claim 1, characterized in that: A coalescer is arranged on the reflux pipe connecting the waste oil tank and the grease trap.

9. A method for recovering and treating emissions from a hydrogen peroxide device, implemented using the treatment system according to any one of claims 1 to 8, characterized in that: include: The oil in the oil phase of the grease trap is pumped into the waste oil tank, and after standing, the water in the waste oil tank is returned to the grease trap; The oil in the waste oil tank is pumped into the reaction tank for treatment; the clean oil after treatment is transported to the clean oil tank; When the oil cleanliness tester on the pipeline connecting the liquid extraction pipe and the waste oil tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the waste oil tank; When the oil cleanliness tester on the pipeline connecting the waste oil tank and the reaction tank detects that the oil cleanliness is qualified, the oil is directly transported to the clean oil tank, and if it is unqualified, it is transported to the reaction tank; When the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is unqualified, it will flow back to the reaction tank for purification again until it is qualified and transported to the clean oil tank.

10. The method for recovering and treating the discharge from a hydrogen peroxide device according to claim 9, characterized in that: The water in the aqueous phase in the grease trap is pumped into the preparation kettle for recycling.

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